Abstract:
In this paper, the 0.5 wt.% different carbon materials/copper composites reinforce with graphite, carbon nanotubes, graphene and graphene oxide were prepared by repressing and resintering process, and the microstructure, relative density, micro-hardness and tensile properties of composites were studied. The microstructure observation indicates that the graphite, carbon nanotubes and graphene are agglomerated in the composites, while graphene oxide is uniformly dispersed in the matrix. The relative density of pure copper and carbon/copper composites is all higher than 96.74%. The micro-hardness of carbon/copper composites is higher than pure copper. The tensile strength of the composites is higher than that of pure copper due to fine grain strengthening and dislocation strengthening, except for graphite/copper composite. However, the elongation of composites is less than that of pure copper because of the weak binding capacity of carbon-copper. By comprehensive comparison, it is found that the composite reinforce with graphene oxide obtains the best performance:the relative density, micro-hardness, tensile strength and elongation were, respectively, 99.04%, 71.2 HV, 229.22 MPa and 66.8%.